Using the location of the not-connected pins F3-F8, I was then able to map these pin-numbers back to the RaspberryPi circuit board:

However these pins are actually under the CPU, and therefore inaccessible as seen in this "xray" picture.

This picture shows what the same area looks like from the back of the board:
(note that the numbers are reversed, since we're looking at the chip from the underside)

I've added a link to the GIMP file I used to create these images to RPi_Hardware in case anybody wants to continue this work...

More images

There was an article on Wired that included some new pictures that I hadn't seen before, and I managed to photo-match all the relevant ones into my same GIMP file. Enjoy... :-)(click on each image for a bigger view)